{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdf071990758d67c746b159cb33f2c216f0b68ff96100974bf3be32175f49394d",
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    "signer": "0x67c92301a1c194b752AF4aDbC196f305de473e90",
    "userId": "532015383"
  }
}